Table 4-2. TROUBLESHOOTING FOR UNIT MAINTENANCE
TEST OR INSPECTION
6. UNUSUAL NOISE OR VIBRATION
Step 1. Check air conditioner installation and mounting brackets.
Replace or tighten loose hardware.
Step 2. Check air conditioner housing covers and attaching hardware.
Tighten loose screws. Replace missing hardware. Refer to Paragraph
Step 3. Remove top cover and check evaporator section components and attaching
hardware for security.
Tighten loose hardware. Replace missing hardware and clamps.
Step 4. Check evaporator-condenser blowers for interference and out of round.
Adjust position of blowers. Replace if damaged. Refer to Paragraph
Step 5. Check evaporator-condenser motor shaft for bearing noise.
Notify Direct Support Maintenance.
Step 6. Check condenser guard for loose or missing hardware.
Tighten loose hardware. Replace missing hardware.
Step 7. Check compressor mounting by grasping compressor and attempting to rock
Tighten mounting hardware if loose.